Daikokuya Kōdayū (1751 - May 28, 1828) is a Japanese castaway who spends eleven years in Russia.

His ship lands at Amchitka, Aleutian Islands.

The crew members manage to escape to the Russian mainland and, by the efforts of Erik Laxmann, with the help of Alexander Bezborodko and Alexander Vorontsov, persuade Catherine the Great to allow them to go back to Japan.

Two make it back to Japan alive, one dies when they stay in Yezo (Hokkaidō), two stays in Irkutsk,becoming Christians, and eleven die.